Experimental evidence for dipole-phonon quantum logic in a trapped calcium monoxide and calcium ion chain

TL;DR

This paper demonstrates experimental dipole-phonon quantum logic in a trapped calcium monoxide and calcium ion chain, showing a significant signal at room temperature that advances molecular ion quantum computing techniques.

Contribution

First experimental implementation of DPQL with molecular ions at room temperature, providing evidence of its viability for quantum information processing.

Findings

Detected a DPQL signal with 4.1σ significance

Signal observed within two hours of data collection

Limited by low thermal population in the molecular ground state

Abstract

Dipole-phonon quantum logic (DPQL) offers novel approaches for state preparation, measurement, and control of quantum information in molecular ion qubits. In this work, we demonstrate an experimental implementation of DPQL with a trapped calcium monoxide and calcium ion chain at room temperature. We present evidence for one DPQL signal in two hours of data collection. The signal rises clearly above the characterized noise level and has a lower bound on the statistical significance of 4.1$\sigma$. The rate of observation is limited by the low thermal population in the molecular ground rotational state.